| 摘要 |
PROBLEM TO BE SOLVED: To provide a highly-stabile small-sized piezoelectric oscillator which has a simple structure easy to assemble, suits to a thinned structure and is manufactured at a low cost. SOLUTION: The piezoelectric oscillator comprises a thermostatic bath printed board 20 having a through-hole 21 for fitting and supporting a cylindrical case with the flange 12 of a piezoelectric vibrator 10 locked to an upper peripheral edge, an oscillator circuit printed board 30 closely contacted with the thermostatic bath printed board top surface supporting a metal-made flange on the top surface, and an oscillator unit 2 having a power transistor and a heater mounted on the top surface of the thermostatic bath printed board. The board 30 mounts main components including oscillator circuit components on the bottom surface side and adjustable components on the top surface and is electrically connected to pins of the piezoelectric oscillator. Ground plating patterns 23a, 23b are formed on the inner wall of the through-hole 21 and the upper peripheral edge and closely contacted with the cylindrical case outer surface and the flange lower surface, and each ground side terminal of the power transistor or the heater is electrically and thermally connected to the ground plating pattern. COPYRIGHT: (C)2005,JPO&NCIPI
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